The most common and most likely answer to this crossword clue is the 8 letter word SPROUTED
I've seen this crossword clue in The Daily Telegraph
S
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Buddy explains!
The straight part
We know that "produced new growth" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case produced new growth = sprouted.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SPROUTED mean?
SPROUTED verb- To grow from seed; to germinate.
- To cause to grow from a seed.
- To deprive of sprouts.
- To emerge from the ground as sprouts.
- To emerge haphazardly from a surface.
- Having sprouts.